US20050012722A1 - Touch screen - Google Patents
Touch screen Download PDFInfo
- Publication number
- US20050012722A1 US20050012722A1 US10/750,661 US75066103A US2005012722A1 US 20050012722 A1 US20050012722 A1 US 20050012722A1 US 75066103 A US75066103 A US 75066103A US 2005012722 A1 US2005012722 A1 US 2005012722A1
- Authority
- US
- United States
- Prior art keywords
- reflection
- light
- touch screen
- film
- touch panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133502—Antiglare, refractive index matching layers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
Definitions
- the present invention relates to a touch screen, and more particularly, to a touch screen with an anti-reflection treatment at a lower end surface of a touch panel to decrease reflection rate relative to light incident from outside and to increase permeability rate of light coming out of a liquid crystal display (LCD), thereby improving brightness of the screen.
- LCD liquid crystal display
- a touch screen is a device wherein a character or a letter appearing on a screen may be touched by fingers or an object to enable input of data into a computer without using a separate input device such as a keyboard or a mouse.
- the touch screen which is a screen attached with a special input device for receiving the position of a touch, is constituted to function as a screen of a general monitor attached with a touch panel.
- touch panels exist, and one widely-used type in automobiles is a so-called resistance film type touch panel, which transforms pressure changes applied from outside to resistance values to be input into a circuit substrate.
- Embodiments of the present invention provide a touch screen having improved light reflection characteristics wherein a retardation film at the touch panel is laminated with special ink in multiple layers to pass through an anti-reflection treatment for reduction of reflection rate of the light to reduce glare caused by diffused reflection of light and for improvement of permeability rate of light coming from an LCD mounted thereunder, thereby optimizing a brightness of the touch screen.
- Embodiments of the present invention comprise a touch panel including an upper structure formed as a lamination of a polarizing film, and a retardation film and a first glass plate, a lower structure formed as a lamination of a second glass plate and a retardation film, conductor coating layers each arranged on an opposing surface of the upper and lower structure and transparent ink sealed in a space between the conductor coating layers; and an LCD mounted under the touch panel.
- the touch panel is laminated with an anti-reflection (AR) film applied with anti-reflection treatment.
- AR anti-reflection
- the AR film is laminated to a surface under the retardation film of the lower structure.
- FIG. 1 is a schematic cross-sectional view of a touch screen according to a preferred embodiment of the present invention.
- the cross-sectional view of a touch screen type monitor includes a touch panel 12 on top of a Liquid Crystal Display (LCD) 10 .
- the touch panel 12 includes a series of laminated layers.
- An upper structure includes a polarizing film 14 and a retardation film 16 respectively laminated on a first glass plate 18 having a thickness of approximately 0.2 mm.
- a second glass plate 20 having a thickness of approximately 1.1 mm is mounted underneath the upper structure.
- a lower structure having a retardation film 22 is mounted underneath the second glass plate 20 .
- first glass plate 18 having a thickness of approximately 0.2 mm at the upper structure and the second glass plate 20 having a thickness of approximately 1.1 mm at the lower structure
- transparent conductor coating layers 24 may be Indium Tin Oxide (ITO). Each such layer is spaced out at a minute distance therebetween.
- ITO Indium Tin Oxide
- a special transparent ink (not shown) that transforms input changes applied from outside to resistance values and inputs same to a circuit substrate.
- the special ink may be a silica sol or the like.
- the polarizing film 14 is treated on a surface thereof with an anti-glare treatment for reducing the reflection rate of light glaring on eyes by diffusing reflection of light irradiated from the outside
- the retardation film 22 at the lower structure is laminated thereunder with the AR film 26 treated with an anti-reflection treatment, where the AR film 26 is made of special ink laminated in layers on the retardation film 22 for absorbing the diffused and reflected light.
- these laminations are in five layers.
- the AR film 26 laminated on the retardation film 22 can absorb the diffused and reflected light from the LCD 10 .
- the surface of the polarizing film 14 is applied with anti-glaring treatment to diffuse the light coming from the outside and to lower the reflection rate of light glaring on a viewer's eyes while light from the LCD 10 is diffused.
- the AR film 26 laminated on the retardation film 22 improves the permeability rate of light output from the LCD 10 while the reflection rate of light coming from outside and diffused by the touch panel 12 is decreased.
- the brightness of screen output from the LCD 10 and recognized via the touch panel 12 can be improved (1.43% improved against the prior art) in response to increase of the permeability rate while reflection rate of light reflected from outside via the touch panel 12 can be decreased to thereby improve viewability of screen (1.28% improved against the prior art).
- the viewability of a screen can be improved such that an installation direction of the monitor can be mounted in accordance with a set-up angle of an instrument panel, thereby enhancing the appearance of the vehicle interior.
- the AR film 26 laminated on the retardation film 22 is mounted underneath the lower structure of the touch panel 12 , such that damage or contamination of the touch panel 12 caused by being brought into contact with a certain portion of a body or a tool can be also obviated.
- a retardation film at the touch panel is laminated with special ink in multiple layers to pass through an anti-reflection treatment for reduction of the reflection rate of light that would otherwise create glare caused by diffused reflection of light and for improvement of permeability rate of light coming from an LCD mounted thereunder, thereby optimizing a brightness of the touch screen.
Abstract
A touch screen improved with reflection rate of light, wherein a retardation film at a touch panel is laminated with special ink in multiple layers to pass through an anti-reflection treatment for reduction of reflection rate of light glaring on eyes caused by diffused reflection of light and for improvement of permeability rate of light coming from an LCD mounted thereunder, thereby optimizing a brightness of the touch screen.
Description
- This application claims priority of Korean Application No. 10-2003-0049120, filed on Jul. 18, 2003.
- The present invention relates to a touch screen, and more particularly, to a touch screen with an anti-reflection treatment at a lower end surface of a touch panel to decrease reflection rate relative to light incident from outside and to increase permeability rate of light coming out of a liquid crystal display (LCD), thereby improving brightness of the screen.
- Generally, a touch screen is a device wherein a character or a letter appearing on a screen may be touched by fingers or an object to enable input of data into a computer without using a separate input device such as a keyboard or a mouse. In other words, the touch screen, which is a screen attached with a special input device for receiving the position of a touch, is constituted to function as a screen of a general monitor attached with a touch panel. Various types of touch panels exist, and one widely-used type in automobiles is a so-called resistance film type touch panel, which transforms pressure changes applied from outside to resistance values to be input into a circuit substrate.
- However, there is a disadvantage in the resistance film type touch screen thus described in that it has poor viewing and brightness characteristics, resulting in an inevitable set-up of the touch screen at a different angle from an instrument panel. This also leads to a deterioration of external appearance of the touch screen and a set-up of a separate member around the touch screen such as an awning or the like in order to block a light coming from the outside.
- Embodiments of the present invention provide a touch screen having improved light reflection characteristics wherein a retardation film at the touch panel is laminated with special ink in multiple layers to pass through an anti-reflection treatment for reduction of reflection rate of the light to reduce glare caused by diffused reflection of light and for improvement of permeability rate of light coming from an LCD mounted thereunder, thereby optimizing a brightness of the touch screen.
- Embodiments of the present invention comprise a touch panel including an upper structure formed as a lamination of a polarizing film, and a retardation film and a first glass plate, a lower structure formed as a lamination of a second glass plate and a retardation film, conductor coating layers each arranged on an opposing surface of the upper and lower structure and transparent ink sealed in a space between the conductor coating layers; and an LCD mounted under the touch panel. The touch panel is laminated with an anti-reflection (AR) film applied with anti-reflection treatment.
- Furthermore, the AR film is laminated to a surface under the retardation film of the lower structure.
- For fuller understanding of the nature and objects of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawing in which
FIG. 1 is a schematic cross-sectional view of a touch screen according to a preferred embodiment of the present invention. - Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawing.
- As shown in
FIG. 1 , the cross-sectional view of a touch screen type monitor according to an embodiment of the present invention includes atouch panel 12 on top of a Liquid Crystal Display (LCD) 10. Thetouch panel 12 includes a series of laminated layers. An upper structure includes a polarizingfilm 14 and aretardation film 16 respectively laminated on afirst glass plate 18 having a thickness of approximately 0.2 mm. Asecond glass plate 20 having a thickness of approximately 1.1 mm is mounted underneath the upper structure. A lower structure having aretardation film 22 is mounted underneath thesecond glass plate 20. - Furthermore, between the
first glass plate 18 having a thickness of approximately 0.2 mm at the upper structure and thesecond glass plate 20 having a thickness of approximately 1.1 mm at the lower structure, there are positioned transparentconductor coating layers 24.Layers 24 may be Indium Tin Oxide (ITO). Each such layer is spaced out at a minute distance therebetween. - At a void between the
conductor coating layers 24, there is filled a special transparent ink (not shown) that transforms input changes applied from outside to resistance values and inputs same to a circuit substrate. The special ink may be a silica sol or the like. - The polarizing
film 14 is treated on a surface thereof with an anti-glare treatment for reducing the reflection rate of light glaring on eyes by diffusing reflection of light irradiated from the outside - The
retardation film 22 at the lower structure is laminated thereunder with theAR film 26 treated with an anti-reflection treatment, where theAR film 26 is made of special ink laminated in layers on theretardation film 22 for absorbing the diffused and reflected light. Preferably these laminations are in five layers. - As a result, the
AR film 26 laminated on theretardation film 22 can absorb the diffused and reflected light from theLCD 10. The surface of the polarizingfilm 14 is applied with anti-glaring treatment to diffuse the light coming from the outside and to lower the reflection rate of light glaring on a viewer's eyes while light from theLCD 10 is diffused. In other words, theAR film 26 laminated on theretardation film 22 improves the permeability rate of light output from theLCD 10 while the reflection rate of light coming from outside and diffused by thetouch panel 12 is decreased. - As a result, the brightness of screen output from the
LCD 10 and recognized via thetouch panel 12 can be improved (1.43% improved against the prior art) in response to increase of the permeability rate while reflection rate of light reflected from outside via thetouch panel 12 can be decreased to thereby improve viewability of screen (1.28% improved against the prior art). - Furthermore, when a structure of a touch screen type monitor thus described is adopted, the viewability of a screen can be improved such that an installation direction of the monitor can be mounted in accordance with a set-up angle of an instrument panel, thereby enhancing the appearance of the vehicle interior.
- Still furthermore, the
AR film 26 laminated on theretardation film 22 is mounted underneath the lower structure of thetouch panel 12, such that damage or contamination of thetouch panel 12 caused by being brought into contact with a certain portion of a body or a tool can be also obviated. - As apparent from foregoing, there is an advantage in a touch screen with an improved reflection rate thus described according to the present invention in that a retardation film at the touch panel is laminated with special ink in multiple layers to pass through an anti-reflection treatment for reduction of the reflection rate of light that would otherwise create glare caused by diffused reflection of light and for improvement of permeability rate of light coming from an LCD mounted thereunder, thereby optimizing a brightness of the touch screen.
Claims (2)
1. A touch screen improved with reflection rate of light comprising:
a touch panel including an upper structure formed as a lamination of a polarizing film, a retardation film and a first glass plate, a lower structure formed as a lamination of a second glass plate and a retardation film, conductor coating layers each arranged on an opposing surface of the upper and lower structure, and transparent ink sealed in a space between the conductor coating layers; and
an LCD mounted under the touch panel,
wherein the touch panel is laminated with an anti-reflection (AR) film applied with anti-reflection treatment.
2. The touch screen as defined in claim 1 , wherein the AR film is laminated to a surface under the retardation film of the lower structure.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2003-0049120 | 2003-07-18 | ||
KR1020030049120A KR20050009838A (en) | 2003-07-18 | 2003-07-18 | monitor with a touch screen improved reflection rate of light |
Publications (1)
Publication Number | Publication Date |
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US20050012722A1 true US20050012722A1 (en) | 2005-01-20 |
Family
ID=34056895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/750,661 Abandoned US20050012722A1 (en) | 2003-07-18 | 2003-12-31 | Touch screen |
Country Status (3)
Country | Link |
---|---|
US (1) | US20050012722A1 (en) |
JP (1) | JP2005038378A (en) |
KR (1) | KR20050009838A (en) |
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US20080029691A1 (en) * | 2006-08-03 | 2008-02-07 | Han Jefferson Y | Multi-touch sensing display through frustrated total internal reflection |
US20080284925A1 (en) * | 2006-08-03 | 2008-11-20 | Han Jefferson Y | Multi-touch sensing through frustrated total internal reflection |
US20090126907A1 (en) * | 2007-11-16 | 2009-05-21 | Manufacturing Resources International, Inc. | Isolated Gas Heating System for an Electronic Display |
US20100296245A1 (en) * | 2008-03-03 | 2010-11-25 | Manufacturing Resources International, Inc. | System for Using Constricted Convection with Closed Loop Plenum As the Convection Plate |
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Cited By (75)
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---|---|---|---|---|
US8259240B2 (en) | 2006-08-03 | 2012-09-04 | Perceptive Pixel Inc. | Multi-touch sensing through frustrated total internal reflection |
US20080179507A2 (en) * | 2006-08-03 | 2008-07-31 | Han Jefferson | Multi-touch sensing through frustrated total internal reflection |
US20080284925A1 (en) * | 2006-08-03 | 2008-11-20 | Han Jefferson Y | Multi-touch sensing through frustrated total internal reflection |
US20080029691A1 (en) * | 2006-08-03 | 2008-02-07 | Han Jefferson Y | Multi-touch sensing display through frustrated total internal reflection |
US8441467B2 (en) * | 2006-08-03 | 2013-05-14 | Perceptive Pixel Inc. | Multi-touch sensing display through frustrated total internal reflection |
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KR20050009838A (en) | 2005-01-26 |
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